diff --git a/firmware/controllers/actuators/electronic_throttle.cpp b/firmware/controllers/actuators/electronic_throttle.cpp
index 4c2c597504..e2eed56940 100644
--- a/firmware/controllers/actuators/electronic_throttle.cpp
+++ b/firmware/controllers/actuators/electronic_throttle.cpp
@@ -690,7 +690,7 @@ struct EtbThread final : public PeriodicController<512> {
 	}
 };
 
-static EtbThread etbThread;
+static EtbThread etbThread CCM_OPTIONAL;
 
 #endif
 
diff --git a/firmware/controllers/engine_controller.cpp b/firmware/controllers/engine_controller.cpp
index 99aa566e39..cc7d5d2b84 100644
--- a/firmware/controllers/engine_controller.cpp
+++ b/firmware/controllers/engine_controller.cpp
@@ -705,7 +705,7 @@ void initEngineContoller(DECLARE_ENGINE_PARAMETER_SUFFIX) {
 #define RAM_UNUSED_SIZE 4000
 #endif
 #ifndef CCM_UNUSED_SIZE
-#define CCM_UNUSED_SIZE 2000
+#define CCM_UNUSED_SIZE 300
 #endif
 static char UNUSED_RAM_SIZE[RAM_UNUSED_SIZE];
 static char UNUSED_CCM_SIZE[CCM_UNUSED_SIZE] CCM_OPTIONAL;
diff --git a/firmware/hw_layer/drivers/can/can_hw.cpp b/firmware/hw_layer/drivers/can/can_hw.cpp
index c45d3a9d15..79247b14ad 100644
--- a/firmware/hw_layer/drivers/can/can_hw.cpp
+++ b/firmware/hw_layer/drivers/can/can_hw.cpp
@@ -162,8 +162,8 @@ private:
 	CANRxFrame m_buffer;
 };
 
-static CanRead canRead;
-static CanWrite canWrite;
+static CanRead canRead CCM_OPTIONAL;
+static CanWrite canWrite CCM_OPTIONAL;
 
 static void canInfo(void) {
 	if (!isCanEnabled) {